*graphic images*Chick with ripped cloaca???!!!!!

It looks like she may be dehydrated to start with and there may be a little poop stuck in there, I would give her some clean water with a bit of molasses in it for some energy whiles she's tucked into your brooder. If you could give her some of her regular feed but put some water in it to make a mash it may encourage her to eat and get her system processing again too. Best of luck to you and your little bird!

 

Can you post some clearer photos?

Separate her so you can monitor her eating/drinking and pooping. Can she poop?


Give her a good soak in a warm epsom salts bath, make sure the vent is covered with solution - gently scrub the vent with a wash cloth after she has soaked for a while - this may help debride any tissue . This will also help you see the vent a bit more clearly.
Could have been a partial prolapse - can't tell very well by the photos but the vent tissue may have hardened. Apply some hemorrhoid cream to keep the vent area moist and help reduce any swelling.

As @Newmamabear suggested keep her hydrated - if you have them add some poultry vitamins to her water and give her wet chick starter. If you are feeding anything else beside chick starter make sure they have access to a source of grit - I find it best to give them a commercial grit (crushed granite) that is found at the feed store.

Molasses acts as a laxative and will help relieve constipation, so generally this would be a one time dosage.

 

How's your little bird doing Em?

 

I'm sorry for your loss.

 

Sorry for your loss Em

 

Oh no Are they your own hatch? Or are they imports from another flock? How long have you had them? Age?
With more than one with the same symptoms I would be inclined to think it may be illness instead of one failure to thrive type situation. Are the rest of your flock all perky?